Post on 24-Dec-2015
INTERNATIONAL INSTITUTE FOR GEO-INFORMATION SCIENCE AND EARTH OBSERVATION
Participatory use of GIS
Spatial data acquisition
Jeroen Verplanke
Introduction
Sketch mapping: usefulness of PGIS
Particpatory spatial data acquisition described with a boundary/land use mapping example
Satellite imagery cannot be the only data sourceSatellite imagery cannot be the only data source
Good for distinguishing large scale dynamics
Social-cultural factors cannot be distinguished
Depending on local knowledge and on-site observations
Good for distinguishing large scale dynamics
Social-cultural factors cannot be distinguished
Depending on local knowledge and on-site observations
Making sketch mapsMaking sketch maps
Result
Perceptions of
distance
and
importance
Reality vs. perceptionReality vs. perception
A1 B1 A2 B2
Visualization strategies
Maps as final products a means of visual communication
Maps as intermediate products an aid to visual thinking
Visualization strategies
What is the purpose of the map ?
Who will read the map ?
Where will the map be used ?
What data are available to compose the map ?
….. ?
Transects
Data collection Sampling
Local guides
PDA
Recording
Boundary mapping
GPS coordinates
Need local knowledge
Resources and boundaries
Boundary data inserted as layer
Other activities and observations
Recording anomalies Observe to understand Triangulation
Impact assessment
Evaluating observationsEvaluating observations